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Blind Mechanism for Demodulating Offset QPSK Signals in the Presence of Carrier Phase Error
KTH, School of Electrical Engineering (EES), Signal Processing.ORCID iD: 0000-0002-4265-9490
2012 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

A computer-implemented system and method for blind demodulation of an offset QPSK input signal, involving repeatedly performing a set of operations, including: (a) applying a phase correction to the input signal based on an estimate of a carrier phase offset of the input signal to obtain a first modified signal; (b) shifting a quadrature component of the first modified signal by half a symbol period relative to an inphase component to obtain a second modified signal; (c) extracting a first sequence of symbols from the second modified signal, where the extraction includes estimating a symbol timing offset from the second modified signal; (d) performing hard-decision demodulation on the first sequence of symbols to obtain a second sequence of reference symbols; (e) computing a phase difference between the first sequence of symbols and second sequence of reference symbols; and (f) updating the carrier phase offset estimate using the phase difference. 

Place, publisher, year, edition, pages
2012.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-120146OAI: oai:DiVA.org:kth-120146DiVA: diva2:613709
Patent
US 8605828-B2 (2013-12-10)
Note

QC 20141024

Available from: 2013-04-01 Created: 2013-04-01 Last updated: 2014-11-10Bibliographically approved

Open Access in DiVA

fulltext(878 kB)45 downloads
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File name FULLTEXT01.pdfFile size 878 kBChecksum SHA-512
15c7f7252f3cd65b1fbb297738f63b74d77a7a9183e19fb403af6dfcc173dae24115703a97a184a74f6d7d2656b90b6d63641cc9d454024307c0424a4081538d
Type fulltextMimetype application/pdf

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http://worldwide.espacenet.com/publicationDetails/originalDocument?FT=D&date=20131210&DB=worldwide.espacenet.com&locale=se_SE&CC=US&NR=8605828B2&KC=B2&ND=4

Authority records BETA

Yajnanarayana, Vijaya

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CiteExportLink to record
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